Blender 2.61 has been release with 180 bugs fixed since it last release, it's available in ppa:cheleb/blender-svn and ready install it through them. this version is available for Ubuntu 11.04 (Lucid) until Ubuntu 12.04 (Precise), here to install Blender 2.61 via PPA, as follows :

What's New Blender 2.61Most notable features in this release is the new render engine Cycles, the Camera Tracker, Ocean Simulation texture and Dynamic Paint. Check following links for the full changelog.